(x+5)+x+(x+15)=100

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Solution for (x+5)+x+(x+15)=100 equation:


Simplifying
(x + 5) + x + (x + 15) = 100

Reorder the terms:
(5 + x) + x + (x + 15) = 100

Remove parenthesis around (5 + x)
5 + x + x + (x + 15) = 100

Reorder the terms:
5 + x + x + (15 + x) = 100

Remove parenthesis around (15 + x)
5 + x + x + 15 + x = 100

Reorder the terms:
5 + 15 + x + x + x = 100

Combine like terms: 5 + 15 = 20
20 + x + x + x = 100

Combine like terms: x + x = 2x
20 + 2x + x = 100

Combine like terms: 2x + x = 3x
20 + 3x = 100

Solving
20 + 3x = 100

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-20' to each side of the equation.
20 + -20 + 3x = 100 + -20

Combine like terms: 20 + -20 = 0
0 + 3x = 100 + -20
3x = 100 + -20

Combine like terms: 100 + -20 = 80
3x = 80

Divide each side by '3'.
x = 26.66666667

Simplifying
x = 26.66666667

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